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Properties of Acids Bases
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H2SO4 + 2NaOH  Na2SO4 + 2H2O

2HNO3 + Mg(OH)2  Mg(NO3)2 + 2H2O

Slide 13

Properties of Bases

Properties of Bases

Bases are proton (hydrogen ion, H+) acceptors

Bases have a pH greater than 7

Bases taste bitter

Bases effect indicators

Red litmus turns blue

Phenolphthalein turns purple

Solutions of bases feel slippery

Bases neutralize acids

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Bases are Proton (H+ ion) Acceptors

Bases are Proton (H+ ion) Acceptors

Sodium hydroxide (lye), NaOH

Potassium hydroxide, KOH

Magnesium hydroxide, Mg(OH)2

Calcium hydroxide (lime), Ca(OH)2

OH- (hydroxide) in base combines with H+ in acids to form water

H+ + OH-  H2O

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Bases have a pH greater than 7

Bases have a pH greater than 7

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Bases Effect Indicators

Bases Effect Indicators

Red litmus paper turns blue in contact with a base.

Phenolphthalein turns bright pink in a base.

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Bases Neutralize Acids

Bases Neutralize Acids

Milk of Magnesia contains magnesium hydroxide, Mg(OH)2, which neutralizes stomach acid, HCl.

2 HCl + Mg(OH)2

MgCl2 + 2 H2O

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